Chemical fire-extinguisher.



P; L. WILBUR.

CHEMICAL FIRE EXTINGUISHER.

APPLICATION FILED NOV. 11, 1907.

Patented Nov. 10, 1908] 2 SREHTS-SHEET 2,

YORK, Y.

CHEMICAL FIRE-EXTINGUISHER.

Specification of Letters Patent.

Patented Nov. 10, 1908.

Application filed November 11, 1907. Serial No. 401,710.

To all whom it may can or-m:

.30. it known that l, lu'rlcu l1. lVjrnsUR, of

the borough of Bronx (tit) and State of New Y rk, have invented a now and useful Improvement in Chemical Fire-Extinguishers,

- of whioh the following is a spvoifiration.

The present invention embraces a construction for a rhemioal fire extinguisher in a eortlanee'with which gas generating materials are held within the body of the extiir guisher sopara-to from. oaol. other andl'rom the mass of the fire extinguishing liquid until such time as it desired to ejeet liquid under gas pressure.

Moreover, the present invention embodies lluall'lS for rei'ulrring the separation aforesaid a ractieally hermetical. one with the result that there is no gradual evolnt' ill of gas or vapor which in course of time tend." to materially affectthe gas yielding cit-parity of the apparatus. 7

A further important feature of the invention relates to means for shutting oil the How of the extinguishing st roan] at the will of the usor of the apparatus.

In the drawings :ltt'( lIll1:lD)-ll'l1 the pros oul sptwification..l igurtl is mainly a lot lmlinal section of a portable lire extinguisher embodying the prrsoi'lt invention. Fig. 2 is 80 an elevation of tho genm'alor together with the handle of th apparatus and certain aei-t-rssory parts showing the same removed from tho extinguisher tank. Fig. i, is a longitudinal SOtllUll upon a sonn'iwhat enlarged sralool the upper portion of the extinguisher, showing in Htt'l-lttil t-orlain parts of the generator, Fig. 41 is a siniilar View upon a similar scale of the. mounting for the valve operating lover. Fig. 5 is a view on an =10 onlargod scale, showing in section the outlet: valve on the pipe lea-ding from tho genoraior into the. upper and of tho tank. Figs. (1 and 7 are perspective views upon an enlarged scale of the valve operating love" and the on a soalo similar to the immetliately Pl't ceding" figures a modified ronslruolion. l'or antral-ting tho valve; l

rt-sporuling parts in all figures.

'lho present; invention tzt'ni'lprises a gas gunolnlo "adapted. to hold gas generating materials so mralted from (.ilt'll olhol' until sut-b time as an ovolutiol'i of gas is desired who e- 55, upon the materials are pormittotl to roam n contact and react in the rontemplatecl man nor, this reaction, moreover, taking place in the generator and not in. the liquid in the main tank of the extinguisher. That to say, as here constructed, the, generator (.Olllprises a cylindrical shell 2 fitted at one end with a. head 3 and at the other and with a rennn'ablo closure 4. The means here adopted for hermetically fastening this end closure in place and at the same time ioavin it free to be removed for the purpose of rctihar ing the generator consists of a coupling 5 w rose llfilul'lta'l lingers :3 may be readll) engaged with and disengaged from oars 6 on the shell reinforce T. "When so engaged, the t-losur'e may be firmly pressed against the packing 8 by a band serovv 9 which enters a tapped-hole in the coupling and is seated in. av socket in the closure, its \vitlulraxval from which is pre-, clut'ltal by a pin Lt) projecting into an annular groove 11 of the screw.

prodmrtion of gas is that between tartaric acid, bioarlmnate of soda and water. Vith these materials the soda and acid may be llllXt'tl and no gas will be 'm-olvtal until, the water is lu'onght in t-ontaot' with the mixcrmu .;onvnts of the gas evolving material are held sopztraled from each other by plaeuig (Conveniently in the 'l'orm of a cartridge l2 hold by tilt-pressed pin-Lions l3 of the wall of the shell) in the lower part of the generator shell while the water charge is rutainw'l in the upper portion of the latter by a diaphragm l4 having a valve (.tfllll'lfOllttl passage 14' for the desreut ot' the water. It. may be 'u'r-niistzd that this controlling valve [:3 is opt'i'alilo 'lroin the exterior of the apparatus through its..stotn lll. Structurally, this valve may he as t lrsirod and appropriatv. it, as illustrated, however. comprising a .sliololou part I? to n'hieh a. proper valve donning partlS is l'astnnet l. Preferably nlu-u shitl'ed onto its soul in the diaphrami l-l-. it is Js'l'illllg' pressod lhvroagainsi as my all'lltll'lillfilllg a spring .20 between. a collar ill on the valve tem and a washer 22 on the valve. Obviously under surh circumstances the. whilv a .shouldt-r 23 on the stem prevents the spritg from lforoiug the valve oll the and ol the slum.

ll Spring .20 \\-ill'i:"ll ll'erluthe accumulation A reaction which may be utilized for theture, The powdered mixture of the twoone in this instant-o tho mixed soda and acid \'lll\'t' is slidabl mounlrd on its atom lUf) the upward extension of an undue pressure in the generator should "valve be closed before gas evolution.

ceases therein valve flap 22 rising some-- what to permit gas to escape through vent 19.. The evolved gas pass. 5 from the gem crate. into the tank B l of the apparatus through exit pipe which is preferably capped by an outwardly opening and an iu- Wes. ly losing valve 526 (to prevent entrance of liquid from the which may comprise a cap on. the end of the pipe in. an. opening in which is slhinbly mounted avulve stem 28 extending from e head 29 in in tapcsiticm. to wiich is a. valve proper ridz'i i'led to open or close JOTt-S 31 in the cop. clv'e head is urged to its seat by :1. spring interposed between the and u collar 33 on the em.

. hendle for manipulating the tank may be of the usual form, designated by 34 here connected by urine with the tank closure which has an internally threaded cylindrical exteisicn 37 adapted to engage with an externally threaded cylindrical extension 37" of tank 24 and form a gas tight joint wien screwed down against. washer 3-8. For the purpose of facilitating the removal of the gencmtor end its sub sequentassociation with the tank, the for 1119.!" may be fixed to the tank closure. For instance it may be screwed to an axial tubu lfl-I extension 89 of such closure, this con struction permitting the assembling of a valve now to be described.

before stated. the present invention includes the provision of means for shutting oil the stream of fluid issuing from the ap baratus at the will of the person menipusting the letter. i This is conveniently done through the medium of a. valve which may be mounted in the aforesaid tubular extension 39. Proceeding with a description of the illust ated application of this feature of the invention, the interior of said extension forms a valve chamber in which works valve 40 efiixed to stem 16 and coiiperative with a seatl, the space below which is open to pipe ,42 terminating in a strainer 43, if (lQSITHtl and close to the bottom of tank 24. for the ascent of liquid therein. Above vulv sent 41-1, the valve chenibci' communicates via port 4-4 with a fitting 45 for the at l'acluucnt of the usual flexible nozzle-tipped. hos 46. This valve chamber is shut oil from the interior space of the generator by pact'ng 47 forced to place against a collar 4 h n' iiengaging with a tl'ircadesl of valve stem 16, the packing mulca tight sliding joint witli the bore of 4 6 and '1' may be used in which a threaded 51 ennlogous to plug 51.

50 of the generator plug 51 is screwed into the top of tubular -:xtcnsion 39 and is provided with uprights 51, 51, extending between which is a. cross pin 51 on which ismounted a hand lever 52, one of the openings in the lever for the passage of the pin being indicated in Fig. 52. Link 53 connects lever 52 und'valvc stem 16, opening 53 in the link and 52 in theglever for the passage oi. levcr-to-link conflicting pin 54; bein shown as Well as openings 53 in the lin for the passage of the stem-to-link c0nnecting Jim 55.

Pug 51 conalti 'tcs part of a st'ulling box,

for stem 16 the le 1 er being packed by packin 56 interposedibetween the bottom of the ho lowed-out interiorly threaded plug 51 and. a nut 57. Packing 58 may be interposed between the end of the plug and the bottom of its threaded receiving socket. If the axis of pins 51 54 and are all sub-v stantially in line with the axis of the valve stem when the hand lever is in a position :irorreiponding to the closed condition of valve 40, see Fig. lated when the lever is swung through a semi-circle to open the valve, see Fig. 3, it is apparent that means are provided for opening and closing both the valves 15 and 40 by an axial movement of tllBStBIXl and automatically retaining them in both of these positions.

instead of a hand lever for operating the (valve, a screw may be employed as in Fi.

8, in which. a. hand screw 59 is shown, this engaging with a threaded opening in a. plug The turning of this screw to the right or left serves to raise and depress the valves as desired. The misplacing and loss of coupling 5 may be avoided by connecting it with a chain 60 to a part rigid with the generator.

. vIt is obvious from the foregoing construction, that no part of the apparatus is subjected to the ressure of gas until there is immediate call for its use and valve stem 16 lifted and that the flow may be shut oil before the force of the gas is spent if the stem is depressed. Moreover, the arts are readily assembled, and the provision of a Livochambered generator in which all the reactive materials necessary for generating gas are held practicull r hermetically separate from each other as well as from the liquid in the tank and -in which admixture and reaction take place permits the use of u nozrfrcczing liquid in the letter. It also prevents agradual yielding capacity oftentimes resulting when the usual extinguisher stands unused for some length of time. It is evident, furtherinc-Le, inc action of. valves 15 and 40 due to a. manipulation. of their stem, is such us to open the discharge from the tank before the chemicals "11X and react and that during the l, and erc'similcrly redeterioration in the gas.

closing movement, the descent of water to the lower part of the generator is shut otf before the discharge from the tank is closed, these operations resultin from the continued movement of a sing e part, to Wit, the valve stem.

therefore reduced to a minimum.

Having described my invention, 1 claim;

1. A chemical tire extinguisher comprising, in combination, a tank, a generator therein for holding the gas generating ma terials in a separated non-reactive condition and for holding the reacting mixture free from liquid in said talik, a valve for permitling the admixture of the materials and for shutting otf access of the materials to each other, a. valve stem operable from the ex terior of the tank, a gas outletleading from the generator into the tank, and a tankdischarge.

.2. A chemical fire extinguisher comprising in cpsbination, a tank, a valve for controlling the admixture of'the gas generating materials, a tank discharge, a valve therein,-

and means for insuring the opening of the for holding the gas generatiilg hold n the reacting mixture free from liquid in sait tank, a valve for permitting the admixture of the materials and for shutti off access of the materials to each other, a

valve stem operable from the exterior of g the tank, a gas outlet leading from the generator into the tank, and a tank discharge leading from said closure.

4; In a chemical fire extinguisher, the combination of a tank for a tire extinguishing" liquid provided with a removable head having a valve chamber depending therefrom, a liquid discharge tube terminating adjacent to the bottom of said tank and emptying into said valve chamber, a two-cliaiiibered generator rigid with the head and having a passage between its chambers, a valve controlling said passage, a valve in said valve chain- Any tendency to the accumnlation of a dangerous pressure in the tank is a adjacent. to the bottom of said tank and emptying into said valve chamber, a two-chainbered gci'ierator depending from said tubular extension and having a passage between its two chambers, an exit tube from the generator into the tank, a valve controlllng said passage between the chambers of the generator, avalve in said valve chamber for controlling the discharge of liquid from the tank, a stem to which said valves are secured, a stufling box throu h which said stem passes a packing carried by said stem separating 'said valve chan'iber from the interior of said generator and means for actuating said stem from the exterior of the extinguisher.

(i. A chemical fire extinguisher comprising in combination, a tank, a generator therein, for holding the gas generating materials in a separated non-reactive condition and for holding the mar-ting mixture free from liquid in said tanE-t, a. spring-press al valve for controlling the admixture of the materials and which is operable from the exterior of the tank, a gas outlet leading from the generator into theutank, and a tank discharge. a i

7. A chemical fire extinguisher comprising, in combination, a tank, a generator therein for holding the gas generating materials in a separated non-reactive condition and for holding the reacting mixture free from liquid in said tank, a valve for controlling the admixture of the materials and which is operable from the exterior of the tank, a gas outlet, leading from the generator into the tank, am outwardly opening and inwardly. closing valve in said outlet, anda tank discharge.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

PETER L. \NILBUR.

\Vitncsses Maa'rm Coon, H. L. VAN SYUKEL. 

